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Atlas / NTSB / WPR11CA212

NTSB CAROL · Event

Event WPR11CA212

2011-04-27 Chandler, Arizona, United States Airport · CHD None 1 aircraft Status: Completed

Registry · N9683P

FAA Aircraft Registry record.

Make / Model

PIPER PA-18-150

Engine

LYCOMING 0-320 SERIES (180 hp)

Seats / Engines

2 seats · 1 engine

Last airworthiness date

19770330

ADS-B equipped

Yes — Mode-S AD7CAD

Registrant of record

WARTHOG FLYING SERVICE INC

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

The pilot’s failure to maintain directional control during the landing roll.

Factual narrative

The pilot reported that she was practicing three-point touch-and-go landings in a tailwheel equipped airplane. The first three touch-and-goes were uneventful. During the landing roll of the fourth landing, the airplane began to veer to the left. The pilot applied full right rudder, however, the airplane continued to the left and exited the runway onto a dirt surface. As the pilot added full power to attempt to avoid a taxiway sign and reenter the runway surface, the airplane briefly became airborne before pitching down and pivoting to the right. Subsequently, the left main landing gear collapsed and the left wing struck the ground resulting in substantial damage. The airplane skidded nose down until coming to a rest. At the time of the accident, the wind was reported from 110 degrees at 7 knots. The pilot reported no mechanical failures or malfunctions that would have precluded normal flight. The pilot reported that she was practicing three-point takeoffs and landings in a tailwheel-equipped airplane. The first three takeoffs and landings were uneventful. During the landing roll of the fourth landing, the airplane began to veer to the left. The pilot applied full right rudder; however, the airplane continued to the left and exited the runway onto a dirt surface. As the pilot added full power to attempt to avoid a taxiway sign and return to the runway, the airplane briefly became airborne before pitching down and pivoting to the right. Subsequently, the left main landing gear collapsed and the left wing struck the ground resulting in substantial damage. The airplane skidded nose down until coming to a rest. The wind was reported to be from 110 degrees at 7 knots at the time of the accident. The pilot reported no mechanical failures or malfunctions that would have precluded normal flight. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12

NTSB Findings

Hierarchical cause / factor breakdown from the FAA bulk avdata database. Each finding tagged C (Cause) or F (Factor).

  • C Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Directional control-Not attained/maintained - C
  • C Personnel issues-Task performance-Use of equip/info-Aircraft control-Pilot - C

Verbatim from NTSB's published report. Source file NTSB_2011_WPR11CA212.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

Related research

What the literature says.

Academic papers and agency reports matching this event's aircraft type or causal vocabulary (icing). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.

Browse the full corpus — academia portal ↗